A number of tech executives and industry luminaries—almost 150, in fact—have signed their names to a letter blasting presumptive Republican presidential nominee Donald Trump.

That includes a number of household names in the tech sector—Steve Wozniak, Vint Cerf, Vinod Khosla, Pierre Omidyar, Mark Pincus, and Chris Sacca.

Though the letter addresses Trump's character via statements he's made or policies he's promised, the bulk of its criticism centers on one simple allegation: "Trump would be a disaster for innovation."

"His vision stands against the open exchange of ideas, free movement of people, and productive engagement with the outside world that is critical to our economy—and that provide the foundation for innovation and growth," it adds.

The list of signers is mostly populated by what Recode described as medium-level executives—so don't bother trying to look for a Cook, Pichai, Sandberg, or a Zuckerberg. Well, not that Zuckerberg. Arielle Zuckerberg, a partner at Silicon Valley venture capital bigwig Kleiner Perkins Caufield & Byers, is on the list. You also won't even find a single Google employee—at least, not a current one.

As the letter notes, those signing it are doing so as individuals, not on behalf of their respective companies.

It would be rare to see someone like Apple CEO Tim Cook speaking out too blatantly against the presumptive Republican nominee. While it will reportedly not provide technology for next week's RNC due to Trumps rhetoric, it hasn't completely shunned the GOP. Earlier this year, Trump called for an Apple boycott in the wake of Cupertino's fight with the FBI. When Timeasked him about that in March, Cook declined to address Trump directly, and instead said it was the company's "responsibility to stand up" to the FBI and its bid to force Apple to crack iOS 9 encryption.

Other CEOs—like Google's Sundar Pichai—have taken to their own blogs to discuss thoughts on some of Trump's philosophies and promises, though not by name.

"The open-mindedness, tolerance, and acceptance of new Americans is one of the country's greatest strengths and most defining characteristics. And that is no coincidence—America, after all, was and is a country of immigrants," Pichai wrote in December after Trump called for a "total and complete shutdown" of Muslim immigration into the US.

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"That is why it's so disheartening to see the intolerant discourse playing out in the news these days—statements that our country would be a better place without the voices, ideas and the contributions of certain groups of people, based solely on where they come from, or their religion."

Mark Zuckerberg also took to Facebook to stress that Muslims "are always welcome here and that we will fight to protect your rights."

One tech insider who likely disagrees? Investor Peter Thiel, a Trump delegate who will reportedly speak at the Republican National Convention.

David Murphy got his first real taste of technology journalism when he arrived at PC Magazine as an intern in 2005. A three-month gig turned to six months, six months turned to occasional freelance assignments, and he has since rejoined his tech-loving, mostly New York-based friends as one of PCMag.com's news contributors.
His rise to (self-described) fame in the world of tech journalism began during his stint as an associate editor at Maximum PC, where his love of cardboard-based PC construction and meetings put him in...
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